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get initial screen implementation mostly working.

This commit is contained in:
Nico 2021-10-28 22:15:56 +01:00
parent 73688d2e96
commit ab47d5974a
3 changed files with 26 additions and 14 deletions
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5
apps/plugins/varvara/devices/ppu.c
View File

@ -29,13 +29,12 @@ ppu_clear(Ppu *p)
}
Uint8
ppu_set_size(Ppu *p, Uint16 width, Uint16 height)
ppu_init(Ppu *p, Uint16 width, Uint16 height, Uint8* buf)
{
ppu_clear(p);
p->width = width;
p->height = height;
p->pixels = realloc(p->pixels, p->width * p->height * sizeof(Uint8) / 2);
ppu_clear(p);
p->pixels = buf;
return !!p->pixels;
}

2
apps/plugins/varvara/devices/ppu.h
View File

@ -22,7 +22,7 @@ typedef struct Ppu {
Uint16 width, height;
} Ppu;
Uint8 ppu_set_size(Ppu *p, Uint16 width, Uint16 height);
Uint8 ppu_init(Ppu *p, Uint16 width, Uint16 height, Uint8* buf);
Uint8 ppu_read(Ppu *p, Uint16 x, Uint16 y);
void ppu_write(Ppu *p, Uint8 layer, Uint16 x, Uint16 y, Uint8 color);
void ppu_frame(Ppu *p);

33
apps/plugins/varvara/varvara.c
View File

@ -9,9 +9,9 @@ copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE.
TODO screen vector, de-janking display code
TODO other devices
TODO hardware builds, support for hardware other than simulated e200
TODO screen vector, de-janking display code, support for greyscale displays
TODO other varvara devices
TODO hardware builds
TODO clean up
*/
@ -139,6 +139,7 @@ static Uxn u;
static Ppu ppu;
static Device *devsystem, *devconsole, *devscreen;
unsigned int palette[3];
static uint8_t framebuffer[LCD_HEIGHT * LCD_WIDTH * 4];
static void
memzero8(void *src, uint64_t n)
@ -165,7 +166,6 @@ inspect(Stack *s, char *name)
}
}
// TODO implement
static void
set_palette(Uint8 *addr)
{
@ -178,6 +178,15 @@ set_palette(Uint8 *addr)
b = (*(addr + 4 + i / 2) >> (!(i % 2) << 2)) & 0x0f;
palette[i] = LCD_RGBPACK(r*8,g*8,b*8);
}
#else
int i;
for(i = 0; i < 4; ++i) {
Uint8
sum = (*(addr + i / 2) >> (!(i % 2) << 2)) & 0x0f;
sum += (*(addr + 2 + i / 2) >> (!(i % 2) << 2)) & 0x0f;
sum += (*(addr + 4 + i / 2) >> (!(i % 2) << 2)) & 0x0f;
palette[i] = sum > 0x17;
}
#endif
}
@ -270,17 +279,21 @@ nil_talk(Device *d, Uint8 b0, Uint8 w)
return 1;
}
// TODO store palette in a non-guesswork format, optimise, make build on non-color devices
static int redraw(Uxn *u)
// TODO optimise, make build on non-color devices
static void redraw(void)
{
rb->lcd_clear_display();
Uint16 x, y;
for(y = 0; y < ppu.height; ++y)
for(x = 0; x < ppu.width; ++x) {
#if LCD_DEPTH > 1
rb->lcd_set_foreground(palette[ppu_read(&ppu, x, y)]);
rb->lcd_drawpixel(x, y);
#else
if(palette[ppu_read(&ppu, x, y)]) {
rb->lcd_drawpixel(x, y);
}
#endif
rb->lcd_drawpixel(x, y);
}
rb->lcd_update();
ppu.reqdraw = 0;
@ -302,7 +315,7 @@ enum plugin_status plugin_start(const void* parameter)
(void)parameter;
DEBUGF("Setting PPU size\n");
ppu_set_size(&ppu, LCD_WIDTH, LCD_HEIGHT);
ppu_init(&ppu, LCD_WIDTH, LCD_HEIGHT, framebuffer);
DEBUGF("UXN init\n");
// Clear RAM and copy rom to VM.
DEBUGF("zeroing\n");
@ -329,7 +342,7 @@ enum plugin_status plugin_start(const void* parameter)
/* empty */ uxn_port(&u, 0xf, nil_talk);
DEBUGF("eval\n");
uxn_eval(&u, 0x0100);
redraw(&u);
redraw();
rb->button_get(true);
return PLUGIN_OK;